Institutional Manager · CIK 0001488542
SIMPLEX TRADING, LLC
CHICAGO, IL · File #028-16834
Latest AUM
$177.42B
Positions
9,381
Top-10 Concentration
67.0%
Filings
12
Sector Allocation
Filing History
View all filings →- 13F HOLDINGS REPORTQ/E Dec 20259,381 pos · $177.42B
- 13F HOLDINGS REPORTQ/E Sep 202510,359 pos · $194.9M
- 13F HOLDINGS REPORTQ/E Jun 20259,904 pos · $174.6M
- 13F HOLDINGS REPORTQ/E Mar 20259,739 pos · $156.2M
- 13F HOLDINGS REPORTQ/E Dec 20249,701 pos · $178.6M
- 13F HOLDINGS REPORTQ/E Sep 20249,647 pos · $170.4M
- 13F HOLDINGS REPORTQ/E Jun 20249,955 pos · $161.9M
- 13F HOLDINGS REPORTQ/E Mar 202410,037 pos · $173.1M
- 13F HOLDINGS REPORTQ/E Dec 20239,859 pos · $127.1M
- 13F HOLDINGS REPORTQ/E Sep 202310,162 pos · $121.6M
- 13F HOLDINGS REPORTQ/E Jun 202310,304 pos · $113.8M
- 13F HOLDINGS REPORTQ/E Mar 202310,527 pos · $91.9M
Top 20 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | SPDR S&P 500 ETF TR | SPY | 41,254,200 | $28.13B | 22.17% |
| 2 | SPDR S&P 500 ETF TR | SPY | 19,433,600 | $13.25B | 10.44% |
| 3 | INVESCO QQQ TR | IVZ | 15,365,400 | $9.44B | 7.44% |
| 4 | INVESCO QQQ TR | IVZ | 9,538,600 | $5.86B | 4.62% |
| 5 | TESLA INC | TSLA | 12,842,700 | $5.78B | 4.55% |
| 6 | NVIDIA CORPORATION | NVDA | 28,686,200 | $5.35B | 4.22% |
| 7 | TESLA INC | TSLA | 11,691,000 | $5.26B | 4.14% |
| 8 | NVIDIA CORPORATION | NVDA | 26,359,200 | $4.92B | 3.87% |
| 9 | ISHARES TR | 464287957 | 16,281,500 | $4.01B | 3.16% |
| 10 | META PLATFORMS INC | META | 4,605,900 | $3.04B | 2.40% |
| 11 | SPDR GOLD TR | GLD | 6,421,700 | $2.54B | 2.01% |
| 12 | APPLE INC | AAPL | 9,285,900 | $2.52B | 1.99% |
| 13 | APPLE INC | AAPL | 7,745,900 | $2.11B | 1.66% |
| 14 | ISHARES TR | 464287907 | 7,824,800 | $1.93B | 1.52% |
| 15 | ALPHABET INC | GOOG | 6,083,500 | $1.90B | 1.50% |
| 16 | SPDR GOLD TR | GLD | 4,151,600 | $1.65B | 1.30% |
| 17 | META PLATFORMS INC | META | 2,425,600 | $1.60B | 1.26% |
| 18 | ALPHABET INC | GOOG | 4,929,700 | $1.54B | 1.22% |
| 19 | MICROSOFT CORP | MSFT | 3,087,200 | $1.49B | 1.18% |
| 20 | AMAZON COM INC | AMZN | 5,860,700 | $1.35B | 1.07% |